Racquetball helmet



FIG. 1 is a top plan view of a racquetball helmet; showing my new design.

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof; the opposite side being a mirror image thereof; and

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a racquetball helmet, as shown and described. 